We're potentially going to be taking trains in and around Frankfurt for 5-6 days next month. We'll be riding from Frankfurt airport to Rothenburg ob de Tauber, then from Rothenburg to Wurzburg (2-way), Rothenburg to Bamburg (2-way), and then Rothenburg to Koblenz, plus Koblenz to Cochem (2-way).
Looking at the schedules, we will be taking a mix of regional and long-distance (Inter-City / ICE) trains, so getting the 'regional only' pass isn't an obvious choice.
There's a '5 consecutive day pass' for $307 (https://bahn.eurail.com/en/one-country-pass/german-rail-pass) that I assume would cover everything. The rough total of our anticipated train journeys so far is ABOUT $250, so the pass doesn't seem to be a money saver, but - if it simplifies the purchase step, it may still be worth it (not having to mess with ticket machines alone is worth something!).
I guess we COULD buy the regional-only month pass, for 58 Euros, then just pay for the ICE trains specifically ... This is the regional pass I'm looking at - 'Deutschland-Ticket' - https://int.bahn.de/en/offers/regional/deutschland-ticket. Total cost for this combination could be as low as (58 regional + 50 ICE + 50 ICE) = 158 Euros - not bad. EDIT TO ADD: it seems like we need to 'subscribe' to the monthly Deutschland Ticket, then remember to cancel that subscription by the 10th of the month to avoid being charged for the next month.
We're both over 65 but I don't see any 'senior' discounts.
I'm assuming the need for, and payment of, seat reservations doesn't change with or without any pass, so that's a wash. And if it's like most other trains we've used in Europe, the reservations are only available on the long-distance trains anyway.